Setting out the drain cover, in order to ensure the trench cover structure size meet the design requirements, according to the technical measurement class diagram and the design requirements of the construction lofting, drainage ditch positioning datum line and horizontal reference line, and the use of the written disclosure and on-site technical form of the relevant data and the measurement point delivery site foreman and construction personnel.
After the drainage ditch cover plate is cleaned and washed, the base of the ditch and the cable trough is cleaned with high pressure water after the cutting of the surface of the side wall.
Drain cover template installation, according to the measurement line, release the installation template positioning line, and then install the template, the template must be vertical. Between the template and the template can not be wrong.
